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Improved coking resistance and sulfur tolerance of nickel-based anodes for solid oxide fuel cells operating on practical fuels
Last modified: 2014-10-08
Abstract
With increasing energy demand and diminishing fossil fuels resources, the development of new energy materials and technologies becomes important for a sustainable future. Solid oxide fuel cell (SOFC) is known as an environmental-friendly and highly efficient electrochemical energy conversion device, which is superior to the low-temperature fuel cells because a number of carbonaceous fuels could be utilized directly. The state-of-the-art anodes for SOFCs are the Ni-based cermets, which suffered from serious coke formation and sulfur poisoning when operated on carbon-containing fuels. These drawbacks have hindered the widespread application of this attractive technology. In this report, we will summerize our past efforts on the modification of convetional nickel-based anodes for operating on practical hydrocarbons or oxygenated hydcrocarbon fuels with improved power output, coking resistance and sulphur tolerances. The innovative methods include applying a funtional layer over the anode surface, adding basic gas as fuel additive, selecting oxyegn-storing proton-conducting oxide as anode secondary phase, and developing lithium-conductive electrolyte as anode decorator.
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